CVE-2026-25136
High
Description
Rucio is a software framework that provides functionality to organize, manage, and access large volumes of scientific data using customizable policies. A reflected Cross-site Scripting vulnerability was located in versions prior to 35.8.3, 38.5.4, and 39.3.1 in the rendering of the ExceptionMessage of the WebUI 500 error which could allow attackers to steal login session tokens of users who navigate to a specially crafted URL. Versions 35.8.3, 38.5.4, and 39.3.1 fix the issue.
SeverityHigh
CVSS8.1
Exploit probability—
ProductCern Rucio
PublishedFeb 25, 2026
First seenFeb 25, 2026
Weakness typeCWE-79Cross-site scripting (XSS)CWE-1004CWE-1004
How to fix
Update
- cern rucio35.8.3, 38.5.4, 39.3.1 or later
- rucio-webui35.8.3, 38.5.4, 39.3.1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| cern rucio | v < 35.8.3, 36.0.0 ≤ v < 38.5.4, 39.0.0 ≤ v < 39.3.1 | 35.8.3, 38.5.4, 39.3.1 |
| rucio-webuiPyPI | v < 35.8.3, 36.0.0rc1 ≤ v < 38.5.4, 39.0.0rc1 ≤ v < 39.3.1 | 35.8.3, 38.5.4, 39.3.1 |
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